Mica Gasket material

Mica gasket material is exceptional in it resistance to high heat. At temperatures over 900 F the ideal sealing material Grafoil or flexible graphite cannot be used. Flexible graphite or Grafoil will coke at those elevated temperatures when oxygen is present, where mica gasket material will not (900 - 1850 F).

We are now stocking FMI Micatherm which is a mica bound with stainless steel for strength.

Mica gasket material is an excellent alternative in these high temperature (to 1800 F) applications. Some of the basics on Mica are shown below. As a gasket material Mica can be very effective in sealing those high temp critical applications with out failing due to the presence of oxygen.

Mica is a mineral, which offers a wide range of exceptional properties.

You may find that some of the properties of mica could improve the different products in your range.

Mica which comes in the form of flaks is completely harmless and presents very high thermal and mechanical performances, allowing it to successfully replace asbestos gasket material in many applications.

American Seal & Packing offers a wide range of gasket materials, each corresponding to specific requirements and designed for a well-defined application. American Seal & Packing can assist you in determining which mica gasket material (or other material) corresponds best to your application.

Mica Thermal Properties

  • Withstands heat up to temperatures of 1850oF (1000oC).
  • Resists fire without burning.
  • Low heat conductivity.

Mica Electrical Properties

  • Insulating strength better than 25 kV/mm.
  • Good resistance against arcing and arc erosion.
  • Permeability to microwaves.

Mica Chemical Properties

Mica is inert to most chemical agents, in particular solvents, acids bases and mineral oils.

Mica Mechanical Properties

  • Very good compression resistance.
  • Good tensile and bending strength.
  • Large elasticity modulus.

FMI Mica Gasket Materials

Manufactured in Italy, FMI produces a high quality gasketing material with metal inserts to improve handling and pressure containment.

Klinger / Thermoseal High Temperature Gasket Material

  • PSS 130
  • PSS 200
  • PSS 300